Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.

Your problem could be alot worse that just the fusebox... Depending on what wires got fried depends on what circuits were open (on ) at the time, and how long the battery was installed backwards... Unlikely that this is gonna be a easy fix, get a mechanic to look at it, and see what exactly got fried.

loosen the battery cable.... start the car with a boost.... after it is running... unhook the battery.... if it dies... replace the alternator... if it keeps running... replace the battery.... make sure this is done outside and everyone working on the car is wearing safety glasses